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密相氣力輸送系統Dense phase pneumatic conveying system
日期:2025-04-25 11:50
瀏覽次數:25
摘要:密相氣力輸送系統Dense phase pneumatic conveying system,密相氣力輸送系統,真空輸送設備
密相氣力輸送系統Dense phase pneumatic conveying system,密相氣力輸送系統,真空輸送設備
以下是對 **密相氣力輸送系統(Dense Phase Pneumatic Conveying System)** 的中英文雙語言詳解,從原理、特點到行業應用**覆蓋,分模塊呈現:

### **系統概述 | Overview**
密相氣力輸送是一種 **低速、高濃度** 的物料輸送技術,通過壓縮空氣(壓力0.1-0.6 MPa)推動物料在管道中以“栓流”或“波狀流”形式移動。適用于易碎、高磨損或需長距離(≤500米)輸送的顆粒/粉體,如再生塑料顆粒、碳黑、金屬粉末等。
Dense phase pneumatic conveying is a **low-speed, high-concentration** material handling technology. It uses compressed air (0.1-0.6 MPa) to push materials in "plug flow" or "wave flow" through pipelines. Ideal for fragile, abrasive, or long-distance (≤500m) transport of pellets/powders (e.g., recycled plastics, carbon black, metal powders).
### **核心組成 | Core Components**
1. **發送罐 | Pressure Vessel**
- 耐壓設計(≥1.0 MPa),配備料位計與流化裝置,確保物料均勻進入管道。
- Pressure-rated (≥1.0 MPa) with level sensors and fluidization plates for uniform material entry.
2. **壓縮空氣系統 | Air Supply Unit**
- 變頻空壓機(15-75 kW)+ 儲氣罐(緩沖壓力波動)。
- VFD compressors (15-75 kW) + air receivers (dampening pressure surges).
3. **輸送管道 | Conveying Pipeline**
- 內襯陶瓷/超高分子聚乙烯(UHMWPE),彎頭曲率半徑≥8倍管徑以減少磨損。
- Ceramic/UHMWPE-lined pipes with bend radius ≥8× pipe diameter to minimize wear.
4. **分離與過濾單元 | Separation & Filtration**
- 旋風分離器(分離效率≥99%)+ 脈沖反吹除塵器(排放濃度≤10 mg/m3)。
- Cyclone separators (≥99% efficiency) + pulse-jet dust filters (emission ≤10 mg/m3).
### **工作原理 | Working Principle**
1. **填充階段**:物料在發送罐內加壓,形成密相料栓;
2. **輸送階段**:壓縮空氣推動料栓在管道中低速移動(速度1-10 m/s);
3. **排放階段**:物料在接收倉減壓分離,空氣經凈化后排出。
---
1. **Filling Phase**: Material is pressurized in the vessel to form dense-phase plugs.
2. **Conveying Phase**: Compressed air pushes plugs at low velocity (1-10 m/s).
3. **Discharge Phase**: Material is separated in receiver, air is purified and vented.
### **關鍵特點 | Key Features**
| 中文 | English |
|------|---------|
| **低破碎率** | Low breakage (e.g., <0.1% for glass beads) |
| **高輸送比** | High solid-air ratio (30:1 ~ 200:1) |
| **節能** | Energy-efficient (30-50% lower power vs. dilute phase) |
| **低磨損** | Reduced pipeline abrasion (wear rate ≤0.1 mm/1000t) |
| **防分層** | Minimized material segregation |
### **與稀相輸送對比 | Dense vs. Dilute Phase**
| 參數 | 密相輸送 | 稀相輸送 |
|---------------------|--------------------------|--------------------------|
| **氣流速度** | 1-10 m/s | 15-30 m/s |
| **適用物料** | 易碎、高密度、磨蝕性物料 | 輕質、非磨蝕性物料 |
| ***大距離** | ≤500 m | ≤100 m |
| **能耗(噸/公里)** | 0.5-1.2 kW·h | 2.0-3.5 kW·h |
### **行業應用 | Applications**
- **塑料回收**:再生PET/PE顆粒的長距離輸送(避免熱降解);
*Plastic Recycling*: Long-distance conveying of rPET/rPE pellets (prevents thermal degradation).
- **化工行業**:碳黑、二氧化硅粉體的無塵輸送(防爆炸風險);
*Chemical*: Dust-free handling of carbon black/silica (ATEX compliance).
- **食品工業**:奶粉、淀粉的衛生級輸送(符合FDA 21 CFR);
*Food*: Hygienic transport of milk powder/starch (FDA 21 CFR compliant).
### **優勢與效益 | Benefits**
1. **保護物料完整性**:速度可控,避免塑料顆粒因碰撞導致分子鏈斷裂(拉伸強度保留率≥95%)。
*Material Integrity*: Controlled velocity prevents polymer chain breakage (tensile strength retention ≥95%).
2. **降低維護成本**:管道壽命延長3-5倍,年維護費用減少40%。
*Maintenance*: Pipeline lifespan extended 3-5x, annual upkeep reduced by 40%.
3. **環保合規**:全封閉設計,粉塵泄漏量<1 ppm,滿足OSHA 1910.94標準。
*Environment*: Fully enclosed system with dust leakage <1 ppm (OSHA 1910.94 compliant).
### **選型建議 | Selection Guide**
- **物料特性**:堆積密度>500 kg/m3或顆粒尺寸>3 mm時優先選擇密相輸送;
*Material Property*: Choose dense phase if bulk density >500 kg/m3 or particle size >3 mm.
- **系統定制**:針對PVC等靜電敏感材料,需增加抗靜電涂層管道+濕度控制(RH 40-60%)。
*Customization*: For static-sensitive materials (e.g., PVC), use anti-static pipes + humidity control.
如需根據具體物料(如尼龍66)或產能(如20噸/小時)提供詳細方案,請提供參數!